http://localhost/myWeb/javaBean.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ page import="mypack.CounterBean" %>
<html>
<head>
<title></title>
</head>
<body>
<jsp:useBean id="myPageBean" scope="page" class="mypack.CounterBean"></jsp:useBean>
<jsp:setProperty name="myPageBean" property="count" value="<%=myPageBean.getCount()+1 %>"/>
current count value is :<jsp:getProperty name="myPageBean" property="count"/>
</body>
</html>
原因：javaBean标签编写错误错误<jsp:getProperty > 少了一个 / 斜杠